Mail-crane.



H. H. POLLOCK.

MAIL CRANE. APPLICATION FILED JAN. I2. 1916- Patented Apr. 10, I917.

WITNESS? INVENTOR.

ATYOR N E Y5.

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barren *ra ATZNT lt h lifilth MAIL-CRANE.

Specification of Letters Patent.

' Patented Apr. 19,,19TZ.

Application filed January 12, 1916. Serial No. 71,621.

To all whom it may concern:

Be it known that I, HENRY H. POLLOCK, a citizen of the United States,residing at Carnegie, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Mail-Crancs, of which the following is a specification.

The invention relates to mail crane constructions, and has for itsprimary objects, the provision of an improved apparatus, (1) which ischeaply and simply constructed, (2) which is strong and durable, (3) inwhich the delivery device is not liable to get out of order, and (4:) inwhich the delivery apparatus will accommodate mail bags of difierentlengths. One embodiment of the invention is illustrated in theaccompanying drawings, wherein Figure l is a side elevation of the cranewith a mail bag shown in dotted lines thereon, and Fig. 2 is a frontelevation of the crane.

The framework of the crane comprises two uprights 1, 1 in parallelism attheir upper ends, as indicated in Fig. 2, and spreading apart in reversev form at their lower portions. These uprights are formed of commercialsections and are preferably secured together at their upper portions bymeans of the plates 2 and 3. The uprights are braced from their frontsides by means of the bracebars t which cross each other indicated inFig. 2, such bars being socured at their upper ends to the uprights, andbeing spiked to the ties at their lower ends, such method of fasteningalso being employed at the lower ends of the uprights. in order toprovide a ladder, a bar or strip 5 is employed, such bar being bentlaterally at its upper end (Fig. 2) and secured by means of the bolts 6.The rungs 7 preferably consist of pipe sections which act as spacerswith bolts extending therethrough.

Pivot-ed between the upper portions of the uprights 1 are the arms 8 and9, provided with the usual pivoted fingers 10 for en gaging the loops atthe end of the mail bag '11. the weight 12 for swinging it to verticalposition when not in use, and when such arm is in use, as indicated inFig. 1, it engages the cross plate 2, which thus acts as a stop.

The upper arm is provided with- The lower arm 9 is mounted so that itwill swing down to vertical position when not in use, and is provided atits inner end with the crank 18. When the arm 9 is in use, as i11-dicated in Fig. 1, a leaf spring l-LL secured to the frame-work, engagesthe crank 13 and tends to move the arm downward from horizontalposition. The spring construction provides a means whereby the apparatuswill. properly support mail bags of some what different lengths. Thespring 14: is relatively strong and while in any position of engagementwith the crank 13 causes the finger 10, on the end of the arm 9 toengage the strap on the mail bag with suilicient force to hold itsecurely. This obviates the necessity of employing any adjusting meansfor the arm 9 in order to support bags of different lengths.

T have found that the apparatus will stand long continued use withoutgetting out of order, and that it will properly hold all the difierentsizes of mail bags that are in use. The frame-work is cheaplyconstructed and of great rigidity. Other advantages incident to theconstruction will readily be apparent to those skilled in the art.

What I claim is:

1. in combination in a mail bag crane, a pair of spaced frame members,an upper arm pivoted to the upper ends thereof, a lower arm pivotedbetween the members and provided with an end at an angle theretoprojecting to the roar of the frame members when the arm is inhorizontal position, and

a leaf spring lying to the rear of the frame members and pressing uponthe said end of the arm when the arm is in horizontal position.

2. In combination in a mail bag crane, a pair of spaced frame members,an upper arm pivoted to the upper ends thereof, a lower arm pivotedbetween the members and provided with an end at an angle theretoprojecting upwardly between the frame members when the arm is inhorizontal position, and a leaf spring secured at its upper end to theframe members with its lower free end pressing upon the said end of thearm when the arm is in horizontal position.

HENRY H. POLLOCK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

